static L<S> splitAtTokens(S s, LS tokens) {
  ret splitAtTokens(javaTok(s), tokens);
}

static L<S> splitAtTokens(L<S> tok, LS tokens) {
  new L<S> l;
  int i = 0;
  while (i < l(tok)) {
    int j = indexOfSubList(tok, tokens, i);
    if (i >= l(tok)) break;
    if (j < 0) j = l(tok);
    l.add(trimJoin(tok.subList(i, j)));
    i = j+l(tokens);
  }
  ret l;
}

static L<S> splitAtTokens(L<S> tok, S... tokens) {
  new L<S> l;
  int i = 0;
  while (i < l(tok)) {
    int j = indexOfSubList(tok, tokens, i);
    if (i >= l(tok)) break;
    if (j < 0) j = l(tok);
    l.add(trimJoin(tok.subList(i, j)));
    i = j+l(tokens);
  }
  ret l;
}

Began life as a copy of #1011989